在快速單元測試中比較字符串

Question

如何在快速單元測試中測試2個字符串是否相等？我試過==操作符，但它不承認它：

import XCTest 
@testable import MyProject 

class MyProject: XCTestCase { 

override func setUp() { 
    super.setUp() 
    // Put setup code here. This method is called before the invocation of each test method in the class. 
} 

override func tearDown() { 
    // Put teardown code here. This method is called after the invocation of each test method in the class. 
    super.tearDown() 
} 

func testExample() { 
    // This is an example of a functional test case. 
    // Use XCTAssert and related functions to verify your tests produce the correct results. 
    XCTAssertNil(nil, "This test works") 
} 

func toJSONTest() { 
    let currentLocation = deviceLocation(timestamp: "2015-11-02 16:32:15 +0000",latitude: "40.2736577695212",longitude: "-111.715408331498") 
    var MyProjectStatuses = [MyProjectStatus(id: "", currentLocation: currentLocation)] 
    let json = "" 
    XCTAssertTrue(json == "") 
} 

func testPerformanceExample() { 
    // This is an example of a performance test case. 
    self.measureBlock { 
     // Put the code you want to measure the time of here. 
    } 
} 

} 

而且從MyProject.swift正在測試的實際方法：

func toJSON()->String{ 
    var json = "" 
    json = "{\"myproject_status\":" 
    json = json + "{\"id\":\"" + self.Id + "\"" 
    return json 
} 

這一部分：

XCTAssertTrue(json == "")

預測：

Operator is not a known binary operator

Answer 1

問題是toJSONTest不是測試。將名稱更改爲testToJSON。

這工作我的機器罰款：

func testToJSON() { 
    let json = "" 
    XCTAssertTrue(json == "") 
} 

的測試運行，並通過。但是，我可能會這樣寫：

func testToJSON() { 
    let json = "" 
    XCTAssertEqual(json, "", "They are not equal") 
}